How to call a Class method dynamically in ruby

Question

Say I have the model name saved in a variable:

"#{class_name.singularize}"

from another controller I want to see the columns defined for this model. I tried

send("#{class_name.singularize}.columns")

but its trying to call Page.columns as a method of the class I am currently working in rather than the Page class. Any ideas on how to do this?

Answer 1

Use constantize:

class_name.singularize.constantize.columns